User:Milton Beychok/Sandbox: Difference between revisions
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===Fan laws=== | |||
The fan laws governing the effect of fan wheel rotational speed (RPM) changes on volume (CFM), discharge static pressure (SP) and the drive motor operating horsepower (BHP) are: | |||
:<math>\frac {CFM_2}{CFM_1} = \bigg(\frac {RPM_2}{RPM_1}\bigg)</math><br><br> | |||
: <math>\frac {SP_{\,2}}{SP_{\,1}} = \bigg(\frac {RPM_2}{RPM_1}\bigg)^2</math><br><br> | |||
:<math>\frac {BHP_{\,2}}{BHP_{\,1}} = \bigg(\frac {RPM_2}{RPM_1}\bigg)^3</math> | |||
Revision as of 19:13, 22 October 2008
Fan laws
The fan laws governing the effect of fan wheel rotational speed (RPM) changes on volume (CFM), discharge static pressure (SP) and the drive motor operating horsepower (BHP) are:
